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Diffstat (limited to 'libavcodec/ivi_common.c')
-rw-r--r--libavcodec/ivi_common.c64
1 files changed, 53 insertions, 11 deletions
diff --git a/libavcodec/ivi_common.c b/libavcodec/ivi_common.c
index 85661281ad..c20ce77b3b 100644
--- a/libavcodec/ivi_common.c
+++ b/libavcodec/ivi_common.c
@@ -3,20 +3,20 @@
*
* Copyright (c) 2009 Maxim Poliakovski
*
- * This file is part of Libav.
+ * This file is part of FFmpeg.
*
- * Libav is free software; you can redistribute it and/or
+ * FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
- * Libav is distributed in the hope that it will be useful,
+ * FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
@@ -133,7 +133,7 @@ int ff_ivi_dec_huff_desc(GetBitContext *gb, int desc_coded, int which_tab,
new_huff.xbits[i] = get_bits(gb, 4);
/* Have we got the same custom table? Rebuild if not. */
- if (ff_ivi_huff_desc_cmp(&new_huff, &huff_tab->cust_desc)) {
+ if (ff_ivi_huff_desc_cmp(&new_huff, &huff_tab->cust_desc) || !huff_tab->cust_tab.table) {
ff_ivi_huff_desc_copy(&huff_tab->cust_desc, &new_huff);
if (huff_tab->cust_tab.table)
@@ -216,6 +216,7 @@ av_cold int ff_ivi_init_planes(IVIPlaneDesc *planes, const IVIPicConfig *cfg)
band->aheight = height_aligned;
band->bufs[0] = av_mallocz(buf_size);
band->bufs[1] = av_mallocz(buf_size);
+ band->bufsize = buf_size/2;
if (!band->bufs[0] || !band->bufs[1])
return AVERROR(ENOMEM);
@@ -238,6 +239,7 @@ av_cold void ff_ivi_free_buffers(IVIPlaneDesc *planes)
int p, b, t;
for (p = 0; p < 3; p++) {
+ if (planes[p].bands)
for (b = 0; b < planes[p].num_bands; b++) {
av_freep(&planes[p].bands[b].bufs[0]);
av_freep(&planes[p].bands[b].bufs[1]);
@@ -267,6 +269,8 @@ av_cold int ff_ivi_init_tiles(IVIPlaneDesc *planes, int tile_width, int tile_hei
t_width >>= 1;
t_height >>= 1;
}
+ if(t_width<=0 || t_height<=0)
+ return AVERROR(EINVAL);
for (b = 0; b < planes[p].num_bands; b++) {
band = &planes[p].bands[b];
@@ -304,7 +308,10 @@ av_cold int ff_ivi_init_tiles(IVIPlaneDesc *planes, int tile_width, int tile_hei
tile->ref_mbs = 0;
if (p || b) {
- tile->ref_mbs = ref_tile->mbs;
+ if (tile->num_MBs <= ref_tile->num_MBs) {
+ tile->ref_mbs = ref_tile->mbs;
+ }else
+ av_log(NULL, AV_LOG_DEBUG, "Cannot use ref_tile, too few mbs\n");
ref_tile++;
}
@@ -435,7 +442,7 @@ int ff_ivi_decode_blocks(GetBitContext *gb, IVIBandDesc *band, IVITile *tile)
/* de-zigzag and dequantize */
scan_pos += run;
- if (scan_pos >= num_coeffs)
+ if (scan_pos >= (unsigned)num_coeffs)
break;
pos = band->scan[scan_pos];
@@ -458,7 +465,10 @@ int ff_ivi_decode_blocks(GetBitContext *gb, IVIBandDesc *band, IVITile *tile)
trvec[0] = prev_dc;
col_flags[0] |= !!prev_dc;
}
-
+ if(band->transform_size > band->blk_size){
+ av_log(NULL, AV_LOG_ERROR, "Too large transform\n");
+ return AVERROR_INVALIDDATA;
+ }
/* apply inverse transform */
band->inv_transform(trvec, band->buf + buf_offs,
band->pitch, col_flags);
@@ -472,7 +482,7 @@ int ff_ivi_decode_blocks(GetBitContext *gb, IVIBandDesc *band, IVITile *tile)
/* block not coded */
/* for intra blocks apply the dc slant transform */
/* for inter - perform the motion compensation without delta */
- if (is_intra && band->dc_transform) {
+ if (is_intra) {
band->dc_transform(&prev_dc, band->buf + buf_offs,
band->pitch, blk_size);
} else
@@ -543,7 +553,7 @@ static int ivi_process_empty_tile(AVCodecContext *avctx, IVIBandDesc *band,
if (band->inherit_qdelta && ref_mb)
mb->q_delta = ref_mb->q_delta;
- if (band->inherit_mv) {
+ if (band->inherit_mv && ref_mb) {
/* motion vector inheritance */
if (mv_scale) {
mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale);
@@ -553,6 +563,22 @@ static int ivi_process_empty_tile(AVCodecContext *avctx, IVIBandDesc *band,
mb->mv_y = ref_mb->mv_y;
}
need_mc |= mb->mv_x || mb->mv_y; /* tracking non-zero motion vectors */
+ {
+ int dmv_x, dmv_y, cx, cy;
+
+ dmv_x = mb->mv_x >> band->is_halfpel;
+ dmv_y = mb->mv_y >> band->is_halfpel;
+ cx = mb->mv_x & band->is_halfpel;
+ cy = mb->mv_y & band->is_halfpel;
+
+ if ( mb->xpos + dmv_x < 0
+ || mb->xpos + dmv_x + band->mb_size + cx > band->pitch
+ || mb->ypos + dmv_y < 0
+ || mb->ypos + dmv_y + band->mb_size + cy > band->aheight) {
+ av_log(avctx, AV_LOG_ERROR, "MV out of bounds\n");
+ return AVERROR_INVALIDDATA;
+ }
+ }
}
mb++;
@@ -678,6 +704,10 @@ static int decode_band(IVI45DecContext *ctx,
idx2 = band->corr[i * 2 + 1];
FFSWAP(uint8_t, band->rv_map->runtab[idx1], band->rv_map->runtab[idx2]);
FFSWAP(int16_t, band->rv_map->valtab[idx1], band->rv_map->valtab[idx2]);
+ if (idx1 == band->rv_map->eob_sym || idx2 == band->rv_map->eob_sym)
+ band->rv_map->eob_sym ^= idx1 ^ idx2;
+ if (idx1 == band->rv_map->esc_sym || idx2 == band->rv_map->esc_sym)
+ band->rv_map->esc_sym ^= idx1 ^ idx2;
}
pos = get_bits_count(&ctx->gb);
@@ -701,7 +731,8 @@ static int decode_band(IVI45DecContext *ctx,
tile->data_size = ff_ivi_dec_tile_data_size(&ctx->gb);
if (!tile->data_size) {
av_log(avctx, AV_LOG_ERROR, "Tile data size is zero!\n");
- return AVERROR_INVALIDDATA;
+ result = AVERROR_INVALIDDATA;
+ break;
}
result = ctx->decode_mb_info(ctx, band, tile, avctx);
@@ -724,6 +755,10 @@ static int decode_band(IVI45DecContext *ctx,
idx2 = band->corr[i*2+1];
FFSWAP(uint8_t, band->rv_map->runtab[idx1], band->rv_map->runtab[idx2]);
FFSWAP(int16_t, band->rv_map->valtab[idx1], band->rv_map->valtab[idx2]);
+ if (idx1 == band->rv_map->eob_sym || idx2 == band->rv_map->eob_sym)
+ band->rv_map->eob_sym ^= idx1 ^ idx2;
+ if (idx1 == band->rv_map->esc_sym || idx2 == band->rv_map->esc_sym)
+ band->rv_map->esc_sym ^= idx1 ^ idx2;
}
#ifdef DEBUG
@@ -773,6 +808,7 @@ int ff_ivi_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
//{ START_TIMER;
if (ctx->is_nonnull_frame(ctx)) {
+ ctx->buf_invalid[ctx->dst_buf] = 1;
for (p = 0; p < 3; p++) {
for (b = 0; b < ctx->planes[p].num_bands; b++) {
result = decode_band(ctx, &ctx->planes[p].bands[b], avctx);
@@ -783,7 +819,10 @@ int ff_ivi_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
}
}
}
+ ctx->buf_invalid[ctx->dst_buf] = 0;
}
+ if (ctx->buf_invalid[ctx->dst_buf])
+ return -1;
//STOP_TIMER("decode_planes"); }
@@ -797,6 +836,9 @@ int ff_ivi_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
av_log(avctx, AV_LOG_ERROR, "Buffer contains IP frames!\n");
}
+ if (!ctx->is_nonnull_frame(ctx))
+ return buf_size;
+
if (ctx->frame.data[0])
avctx->release_buffer(avctx, &ctx->frame);
generated by cgit v1.2.3 (git 2.25.1) at 2024-08-08 11:55:20 +0300